A genetic two-factor model of the covariation among a subset of Multidimensional Aptitude Battery and Wechsler Adult Intelligence Scale—Revised subtests

The phenotypic and genetic factor structure of performance on five Multidimensional Aptitude Battery (MAB) subtests and one Wechsler Adult Intelligence Scale—Revised (WAIS-R) subtest was explored in 390 adolescent twin pairs (184 monozygotic [MZ]; 206 dizygotic (DZ)). The temporal stability of these measures was derived from a subsample of 49 twin pairs, with test–retest correlations ranging from .67 to .85. A phenotypic factor model, in which performance and verbal factors were correlated, provided a good fit to the data. Genetic modeling was based on the phenotypic factor structure, but also took into account the additive genetic (A), common environmental (C), and unique environmental (E) parameters derived from a fully saturated ACE model. The best fitting model was characterized by a genetic correlated two-factor structure with specific effects, a general common environmental factor, and overlapping unique environmental effects. Results are compared to multivariate genetic models reported in children and adults, with the most notable difference being the growing importance of common genes influencing diverse abilities in adolescence.     

Memory bias in the recall of pre‐exam anxiety: the influence of self‐enhancement

Previous research has shown that students asked to recall the anxiety levels they reported prior to an exam exaggerate how anxious they had been. The present study investigated the effect of current emotions on this memory bias by comparing the recall of pre‐exam anxiety in students who either achieved or failed to achieve their target grades. Participants rated their anxiety levels 48 hours prior to the exam and were asked to recall these levels after receiving their exam results. The exaggerated recall of pre‐exam anxiety was observed only in students who surpassed their target grade. Students who failed to achieve their target grade significantly underestimated their pre‐exam anxiety levels. The findings are attributed to self‐enhancement motives that bias the recall of pre‐exam anxiety in the direction that maximizes self‐esteem. Copyright © 2003 John Wiley & Sons, Ltd.     

Effects of gender and sexuality on judgements of victim blame and rape myth acceptance in a depicted male rape

Relatively few studies have investigated judgements towards male rape, and no published studies have investigated gay men's judgements towards this offence. The current study investigated the effects of gender and sexuality on victim blame and male rape myth acceptance in the depicted rape of a gay man. It was predicted that heterosexual men would make the most anti‐victim judgements, while gay men would make the most pro‐victim judgements. One hundred and fifty members of the UK population read a scenario that depicted a male rape, and then completed a questionnaire that measured blame and rape myths. As predicted, heterosexual men endorsed more rape myths and blamed the victim more than heterosexual women or gay men. Gay men made the most pro‐victim judgements overall. Results are discussed in relation to homophobia and traditional gender roles. Copyright © 2003 John Wiley & Sons, Ltd.     

EFFECTIVENESS OF FUNCTIONAL COMMUNICATION TRAINING WITH AND WITHOUT EXTINCTION AND PUNISHMENT: A SUMMARY OF 21 INPATIENT CASES

Functional communication training (FCT) is a frequently used treatment for reducing problem behavior exhibited by individuals with developmental disabilities. Once the operant function of problem behavior is identified by a functional analysis, the client is taught to emit an appropriate communicative response to obtain the reinforcer that is responsible for behavioral maintenance. Studies on FCT have typically used small numbers of participants, have reported primarily on clients for whom FCT was successful, and have varied with respect to their use of other treatment components. The main purposes of the present study were to evaluate the efficacy of FCT for treating severe problem behavior in a relatively large sample of individuals with mental retardation (N = 21) and to determine the contribution of extinction and punishment components to FCT treatment packages. FCT with extinction was effective in reducing problem behavior for the majority of clients and resulted in at least a 90% reduction in problem behavior in nearly half the applications. However, when demand or delay-to-reinforcement fading was added to FCT with extinction, treatment efficacy was reduced in about one half of the applications. FCT with punishment (both with and without fading) resulted in at least a 90% reduction in problem behavior for every case in which it was applied.     

Structural Stability within the Lateral Cerebellar Nucleus of the Rat Following Complex Motor Learning

Complex motor learning, but not mere motor activity, has been previously shown to induce structural modifications within the cerebellar cortex. The present experiment examined whether similar changes occur within one of the primary output targets of the region of the cerebellar cortex in which these structural changes were described, the lateral cerebellar nucleus (LCN; dentate nucleus). Adult female rats were randomly allocated to one of three training conditions. Acrobatic condition (AC) rats were trained to complete a complex motor learning task consisting of a series of elevated obstacles while motor control (MC) condition animals were forced to traverse a flat obstacle-free runway equal in length to the AC task. Inactive condition (IC) animals received no motor training. Unbiased stereological techniques and electron microscopy were used to obtain estimates of synapse number and postsynaptic density (PSD) length within the LCN. Results showed that neither synapse number nor PSD length was significantly altered as a function of training condition. These results indicate that complex motor skill learning is associated with structural plasticity within the cerebellar cortex and with structural stability within the lateral cerebellar nucleus.     

Fathering and Early Onset Conduct Problems: Positive and Negative Parenting, Father–Son Attachment, and the Marital Context

Research literature linking negative and positive aspects of the father–child relationship with early onset conduct problems is reviewed. Evidence from the Preschool Families Project, a longitudinal study of clinic-referred preschool boys at risk for conduct disorder, is presented, including previously unpublished data on father–child attachment. Both negative (e.g., harsh, angry, and physically punitive) and positive (involvement, warmth, and secure attachment) dimensions of fathering, as well as aspects of the marital relationship, appear to be associated with the emergence of early onset conduct problems.